Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb8b3a827d0576e0…

MALICIOUS

PDF

41.1 KB Created: 2020-10-02 14:14:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 7664e3840fb82e527a68fe2d0565e01d SHA-1: c3043011f6b43c2895be2a10dafe8ee14ffa6626 SHA-256: cb8b3a827d0576e0938b9345d038491647f96ab1a7a1f630259444156de66d23
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://gettraff.ru/strik?keyword=castaway+2+hacked+unblocked In PDF document text
    • https://site-1040785.mozfiles.com/files/1040785/lujutukogibofi.pdfIn PDF document text
    • https://site-1036630.mozfiles.com/files/1036630/nalisekexemadukigu.pdfIn PDF document text
    • https://site-1036848.mozfiles.com/files/1036848/pagobotej.pdfIn PDF document text
    • https://site-1036675.mozfiles.com/files/1036675/xoxakutivopa.pdfIn PDF document text
    • https://site-1038414.mozfiles.com/files/1038414/19727243622.pdfIn PDF document text
    • https://site-1036656.mozfiles.com/files/1036656/xoromesexavanapog.pdfIn PDF document text
    • https://site-1038694.mozfiles.com/files/1038694/64830129282.pdfIn PDF document text
    • https://site-1037914.mozfiles.com/files/1037914/vinapofukevusidurusovep.pdfIn PDF document text
    • https://site-1036832.mozfiles.com/files/1036832/15293991348.pdfIn PDF document text
    • https://site-1041181.mozfiles.com/files/1041181/6226797033.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006310.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006310.bin)
    • https://cdn.shopify.com/s/files/1/0484/0377/5640/files/lurgio_middle_school_landing_page.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/3153/0141/files/576133157.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/6946/4727/files/can_couples_match_with_friends_on_hinge.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/4622/8127/files/74993188052.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/5533/6603/files/engineering_mechanics_of_composite_materials_solution_manual.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn extracted file (font_00_sfnt_off00006310.bin)

Related samples 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006310.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6310 5368 bytes
SHA-256: 6dacec43899ebecb8969fac7e6ffc8edecc8428218debc4898715b328e4f7a2a
font_01_sfnt_off00007561.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7561 10016 bytes
SHA-256: aac0f779322f2213274c3574e3d0af299b0455fab7adc0dd799929f257124c83

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